The correct answer is option 4, which states that the particles emitted from a radioactive material may be both electrons and protons.

When radioactive material undergoes decay, it releases various types of particles as a result. Among these particles, electrons and protons are commonly observed.

Electrons are negatively charged subatomic particles that orbit around the nucleus of an atom. They are very lightweight compared to protons and have a charge of -1. When emitted from a radioactive material, electrons can be deflected in a magnetic field due to their negative charge.

Protons, on the other hand, are positively charged subatomic particles that are present in the nucleus of an atom. They are much heavier than electrons and have a charge of +1. Like electrons, protons can also be deflected in a magnetic field due to their positive charge.

Therefore, particles emitted from a radioactive material can include both electrons and protons, which can be deflected in a magnetic field due to their charges.